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Synlett 2005(7): 1137-1141
DOI: 10.1055/s-2005-865211
DOI: 10.1055/s-2005-865211
LETTER
© Georg Thieme Verlag Stuttgart · New York
A Novel and Efficient Approach to (Z)-1,2-Bis(benzodithienyl)ethene Precursors of Tetrathia[7]helicenes
Further Information
Publication History
Received
20 December 2004
Publication Date:
14 April 2005 (online)


Abstract
A new and efficient method for the ‘one-step’ synthesis of (Z)-1,2-bis(benzodithienyl)ethenes has been set up using double Suzuki coupling between stereochemically defined diboronic acid esters and 2-iodo-benzodithiophene. The new Z-alkenes thus obtained can be easily and efficiently photochemically cyclised to the newly substituted tetrathia[7]helicenes.
Key words
coupling - helical structures - fused ring systems - (Z)-1,2-bis(benzodithiophenyl)ethenes - thiahelicenes